Inherent code performance advantages of D over C?

[Marco Leise]

Am Sat, 07 Dec 2013 10:34:53 +0100
schrieb Timon Gehr <timon.gehr at gmx.ch>:

> On 12/07/2013 10:03 AM, Walter Bright wrote:
> > On 12/7/2013 1:30 AM, Marco Leise wrote:
> >> How is that easier in Java? When whole-program analysis finds
> >> that there is no class extending C, it could devirtualize all
> >> methods of C, but(!) you can load and unload new derived
> >> classes at runtime, too.
> >
> > This can be done by noting what new derived classes are introduced by
> > runtime loading, and re-JITing any functions that devirtualized base
> > classes of it.
> >
> > I don't know if this is actually done, but I don't see an obvious
> > problem with it.
> 
> It is actually done, eg. by the HotSpot JVM.

Nice! I thought that the overhead might be considered
excessive in tracking these details for a JIT optimization.

-- 
Marco